Current Conditions
More Information
WeatherCity Home
Switch to Metric Units
[ Almanac ]  
Sunrise:  7:10 am
Sunset:  4:34 pm
[ Moon Phases ]  

New Moon
Jan 16

First Quarter
Dec 27

Full Moon
Jan 4

Last Quarter
Jan 12




December 18th, 2025 :: 6:34 am CST   

Local Weather Report for
Decatur
Illinois, United States

 Decatur Weather Forecast Summary  
 
Today
Dec 18th
Friday
Dec 19th
Saturday
Dec 20th
Sunday
Dec 21st
Monday
Dec 22nd
Mix of rain and snow Cloudy Cloudy Cloudy Cloudy
54°F
31°F
21°F
46°F
32°F
32°F
26°F
35°F
27°F
 
 Decatur Detailed Weather Forecast  
 
Thursday, December 18th, 2025
Morning Temperature: 47°F
Cloudy with periods of rain. Wind 25 to 40 mph.
Afternoon Temperature: 42°F
A mix of cloud and sun with a few showers. Windy at times.
Evening Temperature: 27°F
A mix of cloudy and clear skies. Wind 20 to 30 mph.
Friday, December 19th, 2025
Overnight Temperature: 21°F
Cloudy. Wind 20 to 30 mph.
Morning Temperature: 27°F
Cloudy. Windy.
Afternoon Temperature: 27°F
Mostly sunny.
Evening Temperature: 29°F
Cloudy. Windy at times.
Saturday, December 20th, 2025
Overnight Temperature: 34°F
Cloudy. Windy.
Morning Temperature: 41°F
Cloudy. Windy.
Afternoon Temperature: 37°F
Sunny. Windy at times.
Evening Temperature: 32°F
Clear. Windy at times.
Sunday, December 21st, 2025
Overnight Temperature: 29°F
Clear. Windy at times.
Morning Temperature: 29°F
A mix of sun and cloud. Windy at times.
Afternoon Temperature: 27°F
Sunny.
Evening Temperature: 26°F
Cloudy.
Monday, December 22nd, 2025
Overnight Temperature: 27°F
Cloudy with a slight chance of flurries. Windy at times.
Morning Temperature: 32°F
Cloudy. Windy at times.
Afternoon Temperature: 35°F
Cloudy. Windy at times.
Evening Temperature: 34°F
Cloudy. Windy at times.
Tuesday, December 23rd, 2025
Overnight Temperature: 34°F
Clear with cloudy periods.
Morning Temperature: 41°F
Cloudy with a slight chance of showers.
Afternoon Temperature: 44°F
Cloudy.
Evening Temperature: 45°F
Cloudy.
Wednesday, December 24th, 2025
Overnight Temperature: 46°F
Cloudy.
Morning Temperature: 55°F
Cloudy. Windy at times.
Afternoon Temperature: 58°F
Cloudy.
Evening Temperature: 61°F
Cloudy with a chance of showers. Windy at times.
Thursday, December 25th, 2025
Overnight Temperature: 59°F
Cloudy with a slight chance of showers. Windy at times.
Morning Temperature: 61°F
Cloudy. Windy at times.
Afternoon Temperature: 62°F
Cloudy.
Evening Temperature: 61°F
Cloudy with a chance of showers. Windy at times.
Friday, December 26th, 2025
Overnight Temperature: 50°F
Cloudy with a chance of showers. Windy.
Morning Temperature: 43°F
Cloudy. Windy at times.
Afternoon Temperature: 39°F
Cloudy. Windy at times.
Evening Temperature: 35°F
Cloudy. Windy at times.





 

  [ Local Weather Report ]
Monticello, IL 
 
Sullivan, IL 
 
Clinton, IL 
 
Shelbyville, IL 
 
Tuscola, IL 
 
Taylorville, IL 
4:55 AM  52°F
Overcast
 
Pana, IL 
 
Champaign, IL 
 
Lincoln, IL 
4:55 AM  46°F
Overcast
 
Urbana, IL 

 
This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

  Decatur weather brought to you by WeatherCity Server: us-chi1   Rendered in 0.00294s  
Home   |   About WeatherCity